Efficient synthesis of metallated thioporphyrazines in task specific ionic liquids and their spectroscopic investigation of binding with selected transition metal ions

• Published in: Journal of chemical sciences (Bangalore, India) Vol. 128; no. 9; pp. 1417 - 1422
• Main Authors: POONAM, NAGPAL, RITIKA, ARORA, SMRITI, S CHAUHAN, SHIVE M
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01-09-2016; Springer Nature B.V
• Subjects: Absorption spectroscopy; Binding; Chemical synthesis; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Ionic liquids; Metal ions; Palladium; Substitutes; Transition metals; tetramerization; metal salts; sensors; ionic liquids; Thioporphyrazines; transition metal
• ISSN: 0974-3626; 0973-7103
• DOI: 10.1007/s12039-016-1143-8

Tetramerization of substituted maleonitriles in task specific 2-hydroxylethyl based imidazolium ionic liquids at 120
∘
C gave corresponding electron rich peripheral substituted thioporphyrazines in moderate yield. The 2-hydroxylethyl imidazolium ionic liquids gave better yields of peripheral substituted thioporphyrazines in comparison with non-hydroxyl functionalized ionic liquids. Further, these peripherally functionalized porphyrazines containing sulphur are used to investigate spectroscopically the binding studies with palladium(II) and mercury(II) ions. These metal ions are toxic in nature and deserve serious attention in the area of design of effective separation and efficient micro-sensing techniques. The UV–Vis absorption spectroscopy and fluorescence signalling are mainly used to study peripheral binding of transition metal ions.
Graphical Abstract
Tetramerization of substituted maleonitriles in task specific 2-hydroxylethyl based imidazolium ionic liquids at 120°C gave corresponding thioporphyrazines in moderate yield. The peripherally functionalized porphyrazines containing sulphur are used to investigate spectroscopically the binding studies with palladium(II) and mercury(II) ions. UV–Vis absorption spectroscopy and fluorescence signalling are mainly used as these techniques are highly sensitive and simple to distinguish the chemical and physical changes associated with such metal binding studies.